GATE प्रश्न और उत्तर का अभ्यास करें
8प्र: Which of the following has the highest frequency? 2418 05b5cc698e4d2b4197774c62c
5b5cc698e4d2b4197774c62c- 1Cosmic raystrue
- 2X-raysfalse
- 3Radio wavesfalse
- 4Microwavesfalse
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उत्तर : 1. "Cosmic rays"
व्याख्या :
Answer: A) Cosmic rays Explanation:
प्र: Two bottles contains mixture of milk and water. First bottle contains 64% milk and second bottle contains 26% water. In what ratio these two mixtures are mixed so that new mixture contains 68% milk? 2417 05b5cc626e4d2b4197774b82a
5b5cc626e4d2b4197774b82a- 13 : 2true
- 22 : 1false
- 31 : 2false
- 42 : 3false
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उत्तर : 1. "3 : 2"
व्याख्या :
Answer: A) 3 : 2 Explanation: % of milk in first bottle = 64% % of milk in second bottle = 100 - 26 = 74% Now, ATQ 64% 74% 68% 6 4 Hence, by using allegation method, Required ratio = 3 : 2
प्र: A can build a wall in 16 days while B can destroy it in 8 days. A worked for 5 days. Then B joined with A for the next 2 days. Find in how many days could A build the remaining wall ? 2415 05b5cc6cee4d2b4197774e208
5b5cc6cee4d2b4197774e208- 112 daysfalse
- 214 daysfalse
- 313 daystrue
- 416 daysfalse
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उत्तर : 3. "13 days"
व्याख्या :
Answer: C) 13 days Explanation: Now, Total work = LCM(16, 8) = 48 A's one day work = + 48/16 = + 3 B's one day work = - 48/8 = -6 Given A worked for 5 days to build the wall => 5 days work = 5 x 3 = + 15 2days B joined with A in working = 2(3 - 6) = - 6 Remaining Work of building wall = 48 - (15 - 6) = 39 Now this remaining work will be done by A in = 39/3 = 13 days.
प्र: Is blood homogeneous or heterogeneous? 2412 05b5cc626e4d2b4197774b86f
5b5cc626e4d2b4197774b86f- 1Homogeneousfalse
- 2Heterogeneoustrue
- 3Both A & Bfalse
- 4None of the abovefalse
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उत्तर : 2. "Heterogeneous"
व्याख्या :
Answer: B) Heterogeneous Explanation: Blood is a heterogeneous mixture because the blood cells are physically separate from the blood plasma. The cells have different properties than the plasma. The cells can be separated from the plasma by centrifuging, which is a physical change.
प्र: K is 50% faster than L. If L starts at 9 A.M. and K starts at 10 A.M. L travels at a speed of 50 km/hr. If L and K are 300 kms apart, The time when they meet when they travel in opposite direction is ? 2412 05b5cc741e4d2b4197774f9e5
5b5cc741e4d2b4197774f9e5- 112 pmtrue
- 21 pmfalse
- 311 amfalse
- 411:30 amfalse
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उत्तर : 1. "12 pm"
व्याख्या :
Answer: A) 12 pm Explanation: let 't' be the time after which they met since L starts. Given K is 50% faster than L 50 t + 1.5*50(t-1) = 300 50 t +75 t = 300 + 75 t = 375 / 125 = 3 hrs past the time that L starts So they meet at (9 + 3)hrs = 12:00 noon.
प्र: Assertion( 2411 05b5cc758e4d2b4197774fbd5
5b5cc758e4d2b4197774fbd5- 1: Most of the Himalayan rivers are perennial.Reason(R) : They are fed by melting snow. A) R correctly explains Atrue
- 2R is true but A is falefalse
- 3A is true but R is falsefalse
- 4A) R correctly explains A B) R is true but A is fale C) A is true but R is false D)false
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उत्तर : 1. ": Most of the Himalayan rivers are perennial.Reason(R) : They are fed by melting snow.
A) R correctly explains A"
व्याख्या :
Answer: A) R correctly explains A Explanation: Most Himalayan rivers are perennial because they are fed by the melting snow throughout the year.Thus, both A and R are true & R correctly explains A.
प्र: The average temperature of Monday to Wednesday was 37 C and of Tuesday to Thursday was 34 C. If the temperature on Thursday was 4/5 th of that of Monday, the temperature on Thursday was ? 2411 05b5cc741e4d2b4197774f986
5b5cc741e4d2b4197774f986- 135 cfalse
- 236 ctrue
- 334 cfalse
- 432 cfalse
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उत्तर : 2. "36 c"
व्याख्या :
Answer: B) 36 c Explanation: Monday + Tuesday + Wednesday = 37 x 3 -----------(1)Tuesday + Wednesday + Thursday = 34 x 3---------(2)Thursday = 4/5 of Monday ------------------(3)subtract eqn (1) from (2) we get,Thursday - Monday = -9 => Monday - Thursday = 9.......(4)From (3) & (4), we get So,Thursday = 36 C
प्र: Kamal consistently runs 240 meters a day and on Saturday he runs for 400 meters. How many kilometers will he have to run in four weeks ? 2411 05b5cc6c5e4d2b4197774dd23
5b5cc6c5e4d2b4197774dd23- 15.75 kmsfalse
- 27.36 kmstrue
- 38.2 kmsfalse
- 46.98 kmsfalse
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उत्तर : 2. "7.36 kms"
व्याख्या :
Answer: B) 7.36 kms Explanation: Total running distance in four weeks = (24 x 240) + (4 x 400) = 5760 + 1600 = 7360 meters = 7360/1000 => 7.36 kms